Summary: What to do if you download Rhino and nothing happens after that.
Related installation help: Troubleshooting Rhino 5 Installation
The installer unzips but nothing happens after that.
This problem is caused by Microsoft PCA (Program compatibility assistant), perhaps because an earlier attempt to install Rhino was cancelled.
Note: You may also get a message that you are trying install Rhino on an unsupported operating system. The fix for this problem is in the Unsupported Windows article.